FV Flowplayer Video Player <= - Insufficient Input Validation to Unauthenticated Stored Cross-Site Scripting and Arbitrary Usermeta Update

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2023-4520
CVSS 5.4 (Medium)
Publicly Published August 24, 2023
Last Updated August 25, 2023
Researcher Lana Codes - Wordfence


The FV Flowplayer Video Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘_fv_player_user_video’ parameter saved via the 'save' function hooked via init, and the plugin is also vulnerable to Arbitrary Usermeta Update via the 'save' function in versions up to, and including, due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, and makes it possible to update the user metas arbitrarily, but the meta value can only be a string.



1 affected software package

Software Type Plugin
Software Slug fv-wordpress-flowplayer (view on wordpress.org)
Patched? Yes
Remediation Update to version, or a newer patched version
Affected Version
  • <=
Patched Version

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